Question

Two sides of a triangle are 12 cm and 14 cm. The perimeter of the triangle is 36 cm. What is the third side?

Answer 1

Let the length of the third side be $x$ cm.

Length of other two sides is 12 cm and 14 cm.

Now, Perimeter of triangle = Sum of all sides = 36 m.

$\Rightarrow 12+14+x=36$

$\Rightarrow 26+x=36$

$\Rightarrow x=36-26$

$\Rightarrow x=10cm$

Thus, the length of third side is 10 cm.